Concentrated product of nitrogen and potash and process of recovering and solidifying same.



s. w. SINSHEIME R. CONCENTRATED PRODUCT 0F NITROGEN AND POTASH ANDPROCESS OF RECOVERING AND SOLIDlFYiNG SAME.

APPLICATION FILED MAYlO. 1913. RENEWED m4. 23,1915.

1,1 3%,921 a Patented Apr. 6, 1915.

SIDNEY w. sINsHEIMnR, or SWINK, COLORADO.

CONCENTRATED PRODUCT 0F NITROGEN AND POTASI-I AND PROCESS RECOVER-ING 1I AND SOLIDIFYIN G SAME.

Specification of Letters Patent.

Application filed May 10,-1913, Serial No. 766,893. Renewed January 23,1915. Serial No. 4,073.

To all whom it may concern Be it known that I, SIDNEY W. SINs- HEIMER, acitizen of the United States, residing at Swink, in the county of Oteroand State of Colorado, have invented certain new and useful Improvementsin Concentrated Products of Nitrogen and Potash and Processes ofRecovering and solidifying Same; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention consists of a concentrated product of nitrogen andpotash, and relates also to a process for recovering'same from the wasteliquid remaining in the separation of sugar from molasses and insolidifying said valuable by-products into a composite mass.

In the commercial processes for manufacturing sugar from sugar beets,there remains a waste liquidcontaining large quantities of lime. Thiswaste liquid contains a number of valuable substances, including potashand nitrogen, but, owing to the large amount of water present and thecontained scale-formingsubstances, such liquids have been allowed to goto waste, and the primary ob ject of the present invention is to treatsuch liquids and produce a concentrated product of nitrogen and potashin composite form for eneral commercial use such as a fertilizing agent.

To this end, the invention consists of the product itself in thecombined concentrated form for commercial use, and in the steps andprocesses herein described and claimed for recovering said combinedconcentrate from the waste liquid remaining in the separation of sugarfrom molasses.

In the accompanying drawings forming a part of this application, I haveillustrated diagrammatically one means for carrying out my improvedprocess.

In the operation of my invention, the waste liquid remaining in theseparation of beet sugar from molasses is heated in a suitable tank 1 toa high temperature, preferably 100 C. or more, to precipitate a ortionof the lime and sugar therefrom. he hot liquid is then passed through afilter 2 to remove such precipitate and the filtrate delivered, as by apump 3, to a chamber 4 in the upper portion of a conduit 5 for the hotproducts of combustion from the furnace of a boiler 6; suitable means,such as a fan 21, being employed to produce a suflicientdra-ft for saidhot gases.

The chamber 4 is shown provided with Patented Apr. 6, 1915.

a perforated bottom for discharging the liquid in afinely dividedcondition across the cur rent of hot furnace gases flowing through theconduit 5, thereby insuring a thorough and efiicient action of the COcontained in said gases for converting the salts of the liquid intocarbonates. The carbonates thus formed are only slightly soluble in theliquid and are removed to a large extent by a filter 7 to which theliquid is discharged by gravity from the conduit 5; the filtrate beingdelivered from the filter 7, as by a pump 8, to the first evaporatorunit 9 of a multiple effect. I have shown a multiple effect consistingof six evaporator units, 9, 10, 11, 12, 13 and 14 connected in series bypipes 15 in the usual manner; steam being supplied to the steam space ofthe first unit 9 by a supply pipe 16 from the boiler 6, and a suitablecondenser being connected to ,the final unit 14 by a pipe 17 Thecondensed steam from the steam spaces of the first two units 9 and 10 isfed to the boiler through a pipe 18, thereby providing a distilled feedwater at advantageously high temperature.

The liquid is economically concentrated in the multiple effect toincrease its proportion of solids from about four per cent. toapproximately sixty per cent. or seventy per cent.

The concentrated mass is discharged from the final evaporator unit 14into a finishing pan 19 connected between one of the series ofevaporator-units and a succeeding unit of said series or the condenser.The mass is delivered from the finishing pan 19 to any suitable standardtype of drier 20 where it' is thoroughly dried at a low temperature tothis step is employed, the potash remaining in the final product is inthe form of a sulfate.

I claim: 1. A fertilizing agent comprising a combination of potash andnitrogen in solid form consisting of the residue of Waste liquid afterthe separation of sugar from molasses, treated with CO and evaporated ata low temperature to produce a concen trated compound.

2. The herein described process for recovering potash and nitrogencompounds from the raw Waste liquid remaining after the separation ofsugar from molasses, which comprises treating said liquid at a hightemperature with 00,, then filtering the same, and finally drying thefiltrate at a temperature low enough to prevent substantially the escapeof nitrogen constituents.

3. The herein described process of recovering potash and nitrogencompounds from the raw Waste liquid remaining in the separation of sugarfrom beet molasses,, Which consists in'subjecting such liquid to a hightemperature to precipitate sucrate of lime,

. then filtering the hot liquid, then treating the filtrate With (30,,then filtering the liquid, and then evaporating the filtrate at a lowtemperature.

4c. The herein described process for recovmar-e21 ering potash andnitrogen compounds from the raw Waste liquid remaining in the separationof sugar from molasses, which con sists in subjecting such liquid to ahigh temperature, then filtering the hot liquid, then treating thefiltrate With CO in the presence of heat, then filtering the liquid,then concentrating the filtrate, and then drying the concentrate at alow temperature.

5. The herein described process for recovering potash and nitrogencompounds from the raw Waste liquid remaining in the separation of sugarfrom molasses, Which consists in subjecting such liquid to a temperatureof approximately 100 C. to precipitate a portion of the lime and sugartherefrom, then filtering the hot liquid to remove such precipitate thentreating the filtrate With hot furnace gases to precipitate a portion ofthe salts in the form of carbonates, tering the liquid to remove suchprecipitate, then subjecting the filtrate to the combined action of alow temperature and a vacuum to concentrate such filtrate, and thendrying the concentrate at a lOW temperature.

In testimony whereof, I aflix my signature, in presence of twoWitnesses.

' SIDNEY W. SINSHETMER.

Witnesses:

EDW. S. STEWART, C. B. MARTIN.

